Daily Report for 18th September 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.0 °C (-1.0) 04:34 10.4 °C (-1.2) 14.9 °C (+3.9), 2014 6.8 °C (-4.2), 2010
Maximum Temperature 16.6 °C (-1.7) 14:39 18.4 °C (-1.3) 24.2 °C (+5.9), 2014 15.3 °C (-3.0), 2013
Mean Temperature 12.7 °C (-1.3) 14.2 °C (-1.3) 18.8 °C, 2014 11.8 °C, 2011
Minimum Humidity 61% 14:41 58% 74%, 2015 37%, 2012
Maximum Humidity 95% 04:58 92% 96%, 2014 82%, 2012
Mean Humidity 83% 78% 85%, 2015 60%, 2012
Minimum Pressure 1016 hPa 03:45 1006 hPa 1020 hPa, 2016 995 hPa, 2013
Maximum Pressure 1020 hPa 23:15 1013 hPa 1023 hPa, 2016 1008 hPa, 2011
Mean Pressure 1017 hPa 1010 hPa 1022 hPa, 2016 1004 hPa, 2013
Mean Wind Speed 2.8 mph (-1.1) 4.8 mph (+0.9) 5.2 mph, 2012 1.6 mph, 2016
Maximum Wind Speed 9.6 mph 14:59 13.4 mph 14.0 mph, 2012 7.8 mph, 2011
Maximum Gust 17.3 mph 15:00 21.1 mph 19.2 mph, 2012 10.0 mph, 2011
Mean Wind Direction NNW
Rainfall 1.8 mm 29.1 mm (85%) 2.1 mm, 2015
Maximum Hourly Rain 1.2 mm 23:45 1.9 mm, 2015
Maximum 10-min Rain 0.4 mm 23:45 1.5 mm, 2015
Maximum Rain Rate 2.4 mm/h 23:45 24 mm/h, 2015
Minimum Dew Point 7.7 °C 17:49 7.9 °C 13.9 °C, 2014 0.2 °C, 2012
Maximum Dew Point 11.7 °C 12:04 12.7 °C 17.7 °C, 2014 7.5 °C, 2010
Mean Dew Point 9.7 °C 10.1 °C 15.2 °C, 2014 5.4 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 10.0 °C 04:34 10.6 °C 14.9 °C, 2014 6.8 °C, 2010
Day Maximum (09-21) 16.6 °C 14:39 18.4 °C 24.2 °C, 2014 15.3 °C, 2013
Max 10m Temp Rise 0.7 °C 10:14 0.6 °C 0.7 °C, 2010 0.3 °C, 2016
Max 1hr Temp Rise 2.0 °C 10:53 2.0 °C 2.9 °C, 2010 1.4 °C, 2016
Max 1hr Hum Rise 11% 15:41 12% 11%, 2017 4%, 2016
Max 10m Temp Fall 0.7 °C 15:00 0.7 °C 0.9 °C, 2015 0.2 °C, 2016
Max 1hr Temp Fall 1.8 °C 15:37 1.8 °C 2.0 °C, 2010 0.8 °C, 2016
Max 1hr Hum Fall 16% 14:41 10% 16%, 2017 6%, 2015
Max 10m Wind Speed 5.9 mph 13:11 9.8 mph 8.5 mph, 2012 5.6 mph, 2011
Minimum Feels-like 10.9 °C 04:29 10.4 °C 18.2 °C, 2014 5.2 °C, 2010
Maximum Feels-like 18.1 °C 14:33 20.3 °C 28.4 °C, 2014 15.7 °C, 2013
Mean Feels-like 13.8 °C 15.5 °C 22.9 °C, 2014 11.7 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.6 °C (-0.7) 8.0 °C (-0.1) 9.7 °C (+2.4), 2009 4.8 °C (-2.5), 2016
Humidity Range 34% 33% 45%, 2012 18%, 2015
Pressure Range 4 hPa 7 hPa 19 hPa, 2012 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3 [27%]76 hrs (89%) [36%] 8 [71%], 2010 0.2 [2%], 2016
Wet Hours 2.5
[Mean rain rate: 0.7 mm/h]
32 hrs (130%) [7.4%] 2.5, 2017 0, 2009
Cloud Cover Mostly Cloudy with periods of Partly Cloudy
Events None
Comments 11-16 brief Showers; 22- Rain
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Notes
Times of extremes are computed using the midpoint time of the extremum (if the value persisted for >1 minute).
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs, Wet hrs, Cloud cover and Events are based on manual equipment/observations; their reliablity is questionable and they are provided for interest only.
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Daily Graph of Conditions

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